Microservices and containers have changed the way developers create new applications. Microservice architectures allow us to decouple applications in their components, and today we have tools that can provide them with orchestrated and seamless interactions. Also, containers have changed the deployment artifacts for applications. We have moved from binaries to container images. This new development workflow helps developers to build applications faster and more securely, and ensures that the final product will work as intended, anywhere, without many modifications. Applications deployed as containers will follow general code versioning rules, which helps us to keep track of component releases and behavior.

This book will introduce microservices and containers and will help us to learn the key concepts of these technologies. We will learn how containers work, see how networks are implemented in different scenarios, and explore Docker Swarm and Kubernetes orchestration strategies and environments. We will also cover all the Docker Enterprise components and features required to implement Container as a Service platforms in production. All the topics covered in this book, with sample questions and detailed answers, will help you to learn the knowledge required to pass the official Docker Certified Associate exam.